Test lamp



TEST LAMP Filed Dec. 26, 1928 Dec. 2.7, 1932. s. l. CHARLESWORTH ET AL Patented Dec. 27, 1932 UNITED STATES PATENT OFFICE STANTON I. CHARLESWORTH, A RCH W. HARRIS,AND CARL I. LINDER, OF CLEVELAND, OHIO TEST LAMP Application led Decemberi26, 1928. Serial No. 328,552.

This invention relates to sulfur test lamps for laboratory use in test-ing fuel oils such as benzol, benzine, gasoline and the like, to ascertain their sulfur content, and has for its object the provision of an improved form of lamp which will provide a. more constant feed of the oil being tested and one that will be easier to operate than the lamps heretofore commonly used.

Heretofore, lamps of this type have had pipettes provided with stop-cock control valves for controlling the flow of the oil to be tested and, since said oil had to be delivered in such minute quantities, it Was necessary to provide a stop-cock having a minutely etched tapering groove through which the oil flowed. At times all fuel oils, and particularly benzol, have quantities of entrained water therein and when testing such oils the water will clog the stop-cock groove and cause an irregular fuel feed.

The present invention provides a constant feed valveless pipette and an improved heating and vaporizing tube, whereby the fuel oil may be burned with a constant and regulated flame.

In the drawing:

The figure is a vertical sectional view through a lamp constructed in accordance with this invention.

Referring more particularly to the drawing, the numeral 2 designates a hollow metal base member having a handle 3.

A U-shaped heating and vaporizing tube 4 is mounted Within the base 2, a filling of asbestos 5 is packed around the tube 4, and the top of the filled base is closed by a layer of cement 5a.

The upper end 6a of one arm 6 of the tube 4 is bent at right angles and is terminated in a swell 7 to receive a short length of rubber tubing or hose 8 which is adapted to be compressed by a clamp 8'EL to regulate the flow of air through the tube 4. The other arm 9 of the tube 4 has its upper end flared, as at 10, to receive a tapered stopper 11 having a centrally arranged aperture 12 therein.

A burner tube 13 communicates through and is integrally connected to the side of the arm 9 and extends through the base and has its free end bent upwardly so as to project above the base. The free end of the tube 13 terminates in a burner bulb 14.

An electrical resistance element 15 is wound around the tubes 4 and 13 and has its ends con- 55 nected to binding posts 16 to which electric conductors may be connected. The arm 6 of the tube 4 is preferably lled with a quantity of glass wool 17 which serves to break up the incoming air and also to supply heating sur- 60 face for the air to contact with.

A constant feed pipette A is mounted in the apertured stopper 11 and comprises a tubular body 18 having an enlarged bulb-like 'reservoir 19 intermediate its ends and hav- 65 ing its lower portion reduced to form a wick chamber 20 of equal diameter throughout its length. The wick chamber is adapted to be filled by a wick 21 made of cotton, glass Wool or similar material, which is adj usted so as to 'l0 project down beyond the pipette an appren ciable distance, as at The pipette is adapted to be filled to a point slightly above the reservo-ir 19 with the oil to be tested which will flow through the wick by capillary attraction. The upper end of the pipette A is closed by an air-tight stopper 23.

The pipette is mounted in the aperture 12 of the stopper 11 and is adapted to be adjusted so that the projecting lower end of the wick 21 is opposite the burner tube 13.

In operation, the apparatus is first brought to a predetermined proper temperature, the pipette A is then filled nearly to the top with the fuel oil to be tested and the stopper 23 85 is inserted. The stopper 11, with the pipette mounted in it, is then placed in the flared end 10 and as the oil is vaporized from the lower end of the Wick, the vapors are lighted at the bulb 14. The flame will be adjusted by admitting more or less air which is adjusted by means of the clamp 8a and, if necessary, the flame may be further adjusted by raising or lowering the pipette through the stopper 11. The wick 21 tends to draw or 95 suck the fuel oil from the pipette by capillary attraction and the heated air carries the oil vapors to the burner bulb. This causes a vacuum above the oil and bubbles of air go up through the wick, thus replacing the oil continuously and also serving to indicate the feed. rlhe oil is fed trom the pipette constantly and, therefore, once the flame is adjusted it will remain constant.

`While we have shown one specific embodiment of. our invention, we do no t wish to be limited thereto since various modifications may be made Without departing fromthe scope thereof, as defined in the appended' claims. .v

wWe claiml. A constant feed pipette for use with sulfus test lamps and the like comprisin a tubular body having` an enlarged bulb-line reservoir intermediate its ends and having its lower portion reduced in diameter to form a wick chamber, an air-tight closure at the upper end of said body, anda wick mounted in said wick chamber. Y A

2. A constant feed pipette for use with sulfur test lamps and the like comprising a tubular body having an enlarged bulb-like reservoir intermediate its ends and having its lower portion reduced in diameter to forni a wick chamber of equal diameter throughout its length, an air-tight stopper mounted in the upper end of said pipette body, and a wick mounted in said wick chamber and projecting below said pipette, said wick being vof such size as to prevent a flow of fluid through said pipette, said fluid being adapted to pass from said pipette by absorption of said wick and vaporization from the projecting lower end of said wick only.

3. A sulfur test lamp for burning fuel oils such as benzol, benzine, gasoline, etc., and comprising a hollow base member having a U-shaped air heating and vaporizing tube mounted therein with its ends projecting upwardly beyond the top of said base', aninsu lating and heat-resisting filling in said base and around said tube, one arm of said tube having its upper end bent at substantially. right angles and terminating in a Aswell so o as to permit a length of rubber hose to be connected thereto`r the other arm of said tube being slightly flared to receive a tapered stopper, a burner tube communicating through and integrally connected to the side of said last named mediate its ends, said burner tube extending an appreciable distance within said base and then projecting upwardly above said base and terminating in a burner bulb, an apertured stopper in said flared end of said U shaped tube, a constant feed pipette mounted in the aperture of said stopper and projectingdownwardly in said `U-shaped tube, a bulb-like reservoir intermediate the ends of said pipette to contain the fluid to be tested, an air-tight stopper in the upper end of said pipette and a wick in the lower end ofl said pipette'and projectingslightly below said pipette and into said U-shaped tube, a filling of glass wool in at least a part Aof said U- arm of said U-tube interieeaeee shaped tube and a heating coil mount-ed around said U-shaped and burner tubes.

Li. A sulfur test lamp for burning fuel oils such as benZol, benzine, gasoline, etc., and comprising a hollow base member-,having a U-shaped air heating and vaporizing tube mounted therein with its ends projecting upwardly beyond the top of said base, an insulating and heat-resisting filling in said base and around said tube, one arm of said tube having its upper end bent at substantially right angles and constituting an air inlet, means for regulating the flow of air ythroingh said air inlet, the other arm of said tube being slig tly flared to receive a tapered stopper, a burner tube communicating through and integrally connected to the side of said last named arm of said U-tube intermediate its ends, said burner tube extending ,4

an appreciable distance within said base and then projecting out of said base and termiating in a burner bulb, an apertured stopper in said flared end of' said U-shaped tube, means for providing a constant feed of fuel oil through said stopper and into said U- shaped tube, a filling of glass wool in at least a party of said U-shaped tube to baffle the air flowing therethrough, and a heating coil mounted around said U-shaped and burner tubes to preheat the air. flowing through said lJ-shapedtube andy to vaporize and preheat the fuel ted to said tube.

5. A sulfur test lamp for burning fuel oils such as benzol, benzine, gasoline, etc., and comprising a hollow base member having a U-shaped air heating and vaporizing tube mounted therein with its ends projecting upwardly beyond the top of said base, an insu lating and heat resisting filling in said base and around said tube, one arm of said tube having its upper end bent at substantially right angles and constituting an air inlet, means for regulating the flow of' air through said air inlet, the other Yarm of said tube'being slightly flared to receive a tapered stopper, a burner tube communicating through and integrally connected to the side of said last named arm of said Utube intermediate its ends, said burner tube extending an appreciable distance within said base and then pro jecting out of said base and terminating in a burner bulb, an apertured stopper in said flared end of said U-shaped tube, a constant feed pipette mounted in the aperture of said stopper and projecting downwardly in said lJ-Vshaped tube, a bulb-like reservoir intermediate the ends of said pipette to contain the fluid toA be tested, an air-tight stopper in the upper end of said pipette andV a wick in the lower end of said pipette and projecting slightly below said `pipette and into said U-shaped tube, a filling of glass wool in at least a part of said U-shaped tube to baille theair flowing therethrough, and a heating coil mounted around said U-shaped and 

